X11OpenGLWindow: create stencil buffer for shadows in OpenGL2 mode (OpenGL3 uses shadow maps)
Add 'createCollisionObjectGraphicsObject' API for CommonPhysicsSetup
Add 'pthread' dependency as workaround for NVIDIA graphics driver issue
(see //See https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-319/+bug/1248642
)
CMakeLists.txt: OSX check is below 10.9 (not below 10.10), and add new files